2 SPI .020 Over Bore Piston Kits for Polaris 500 RMK fits 1997 1998 1999 72.5mm

2 SPI .020 Over Bore Piston Kits for Polaris

These piston kits provide a .020 inch oversize bore for Polaris 500 RMK snowmobile engines from 1997 to 1999, using a 72.5mm bore diameter.

Overview

These 2 SPI .020 over bore piston kits are designed for rebuilding Polaris 500 RMK engines. Each kit includes a pair of pistons, rings, and wrist pins for a complete top-end overhaul. The .020 oversize allows for a fresh bore on worn cylinders, restoring compression and performance.

Built For Performance

• Precision-machined from high-strength aluminum alloy for durability
• Coated skirts reduce friction and wear during operation
• Plasma-moly piston rings provide excellent seal and longevity
• Matched weight sets ensure balanced engine operation
• Includes wrist pins and circlips for easy installation

Fits These Machines

• for Polaris 500 RMK (1997-1999)

On-The-Job Use

• Backcountry trail riding and snowmobile adventures
• Snowmobile racing and high-performance applications
• Heavy snow conditions requiring reliable engine output
• Restoration of older Polaris 500 RMK snowmobiles

Specs At A Glance

Good To Know

Q: What is included in the kit? A: Each kit includes two pistons, piston rings, wrist pins, and retaining circlips.

Q: Can these pistons be used with a standard bore? A: No, these are .020 oversize and require the cylinder to be bored to match.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.